And grindin



(No Model.) 4 Sheets-Sheet 1., I

J. U. ABBI' &, J. MUHLETHALER. MACHINE FOR HULLING AND GRINDING CORN.

No. 349,418. j \V 5 Patented Sept. 21, 1886.,

. (No Model.) I 4 Sheets-Sheet '2.

J. U. AEBI 86 J. MUHLETHALER. MACHINE FOR HULLI'NG AND GRINDINGOORN.

Patented-Sept. 21, 1886-.

N, PETERS. Phnwmm m hzn wmhin wn. D. c.

(No Model.) 4 Sheets-Sheet 3..

J. U. AEBI & J. MUHLBTHALERf MACHINE FOR HULLING AND GRINDING CORN.

No. 349,418. Patented Sept 21, 18861 1 73.

N4 PETERS. PMXo-Lilhcgnphcr. wash-" um D. c.

(No Model.) 4 Sheets-Sheet 4.

'J. U. AEBI-& J. MUHLETHALER. MACHINE FORVHULLING AND GRINDING 001m; No. 349,418. I Patented Sept; 21, 1886.

N. PLILRS, Phnwulho n nnr. wasmn mn, n. c.

- UNITED: STATES PATENT OFFICE.

JOHANN ULRICH AEBI AND J AKOB MUHLETHALER, OF BURGDORF, BERNE,

' SWITZERLAND.

MACHINE FOR HULLING AND GRINDING CORN.

sPEorrroATIoN forming part of Letters Patent No. 349,418, dated September 21, 1886.

Application filed June 2, 1885. Serial No. 167,446.

vented certain new and useful Machines for Hulling and Grinding Corn, of which the following is a specification.

The invention consists in certain improvements in machines for hulling and grinding corn, whereby the hulls may be readily removed and the grain rapidly conducted be tween the hulling surfaces, and whereby the grinding-faces may be readily repaired, and whereby either the hulling or the grinding portion of the machine may be adjusted without necessarily disconnecting it from the other, and without the use of more than one drivingbelt.

In the drawings, Figure 1 shows a longitudinal section of the machine. Fig. 2 is an end View thereof seen from the hulling mech- Fig. 3 is a rear view of the disks G Fig. 4 is a front anism. g G of the hulling mechanism.

. view of the diskK of the grinding mechanism.

ing mechanisms are connected together upon one frame or foundation. The hulling. mechanism consists of the stationary hulling-plates F, F, and F. The two latter plates F and F are provided on their circumferences with flanges h, forming circular chambers between the plates. The hulling-plates are covered on their hullingsurfaces with rasping-plates s s s.

E is the inlet-funnel of the hulling mechanism. The plate F is secured to part of the frame S of the machine. Opposite to the hulling-plates rotate the running disks G G G each covered on one side with a rasping-plate, s s 8. Spiral feeding screws or flanges n, n, and n are cast or otherwise disposed on the hubs of the running disks G G G". The hubs of the running disks have their contiguous ends beveled, as at if, or otherwise formed to bind one on the other, and hence cause the several disks to rotate simultaneously. This construction permits the removal of the disks G or G without disturbing disk G. The first disk, G, is secured to the shaft W by means (N0 model.)

Q of a throughpassing peg, is, while the disk G is fixed by means of a screw, 1). The intermediate disk, G, is maintained by the two exterior disks, G and G by the frame, contains the grain to be hulled, which is conducted by means of the screw n thence over the periphery of the disk G into A funnel, E, formed the space betweenG and F, whence it is conducted to the screw n by means of the spirally-shaped rib B, Fig. 3, 011 the back of G. From here the grain passes in the same way into the space between the next plate, F and G, and so on, the last plate or disk,G ,having no spiral rib, the grain passing into the discharge A.

To regulate the entrance of the grain to be hulled we use a slide-valve (see Figs. 1 and 4) consisting of two guide-plates, X X, disposed in such a way that they can be moved Vertically to and from each other by means of toothed pinion 3, engaging with racks on the plates. The inlet-opening to the plates F and G can thus be modified at will and the entrance of the grain can consequently be regulated, as shown in Figs. 1, 2, and 4.. The pinion 3 is secured to a shaft, to, provided with a grain during the hulling operation. The air- I exhaust openings (1 (1, Figs. 1 and 2, in the case of the hulling mechanism are covered with perforated plates 5 5.

Upon the nave of the exterior cover-disk, J, of the case S is the adjusting contrivance for the running disks G, G, and G", shown in Figs. 5 to 9.

The running disks, which are secured upon 'the shaft W, are moved from and to the stationary hulling-disks F, F, and F by means of the adjusting contrivance of the following construction: The nave J is provided with screw-threads into which are cut the longitudinal grooves Z Z. Upon the nave is slid a ring, 12, with inwardly-projecting lugs Z Z, catching into the grooves Z Z and abutting against the inner ends thereof, thereby limiting the distance the said ring is slid on the nave and preventing the ring from turning. An internallythreaded shell, D, provided with arms f, projecting from one end of the said shell in diametrically-opposite directions, is screwed on the nave J until it abuts against the ring 1;. The ends of the arms f are then bent so as to pass through the notchesc in the said ring and grasp the latter, thus preventing the shell D from turning; or the arms f may be bent directly overthe edge of the ring, and set-screws 'i t, passing through said arms and biting into the said ring, may be used to prevent the shell from turning. The shell D has at the end opposite the arms f a partition, D, with a central smooth aperture, through which projects the threaded end of the shaft W, the said end car- .ying a clamp nut or nuts, 0, bearing against the partition D, and thereby preventing inward longitudinal movement of the shaft. The shell D is also provided with a bow, E,

; the outer end of which carries a stop-screw,

P, in line with shaft WV, and provided with clamp-nuts c and c. The said screw P is normally in contact with the end of the shaft W, preventing the latter from moving outward. By loosening the nuts 6 on the shaft NV and the nuts 6 and c on the screw P the latter may be turned to move against the shaft, forcing it inward, and thereby reducing the space between the running disks and the stationary disks. The shaft WV when adjusted is retained against inward movement by the nuts 0 bearing against the partition D, and against outward movement by the screw P, which bears against the end of the shaft WV.

To increase the distance between the running disks and the stationary disks the screw P is moved out of contact with the end of the shaft W, and the nuts 6 are turned to carry the said shaft outward until the end thereof is in contact with the screw P.

The construction of the grinding mechanism is somewhat similar to that of the hulling' mechanism. The stationary grinding-plate K and the running plate L are provided with ribbed steel rings is, Figs. 1 and 4.

The regulation of the running disk L is offected by a similar contrivance to that .described for the hulling mechanism. The regulating device is fixed upon the nave J. I The entrance of the grain from the inletfunnel into the space between the grindingplates is regulated in the same way as in the hulling mechanism by means of adjustable sliding valves 00'.

The grinding-disks consist, as shown in Fig. 4, of rings with suitable grinding-surfaces, which rings may easily be exchanged and sharpened when they have become blunt or worn. The rings are sharpened on a planingmachine by means of a chisel. The two mechanisms are simultaneously driven from. the pulley T, which consists of two parts, T T, gearing together like clutch-couplings. The clutches allow thus a longitudinal displacement of the shafts in order to regulate the two mechanisms.

\Ve claim 1. The combination, with the frame and a series of stationary hulling-surfaces having rasping-plates, of a shaft carrying a series of rotating disks, each provided with raspingplates on one side, and all but the last having spiral feeding-ribs 011 the other side, substantially as described.

2. The combination, with a hopper, of a series of stationary hulling-surfaces having rasping-plates, a series of rotating disks having rasping-plates and feeding-screws on one side, and the spiral feeding-ribs fixed to the sides of all the disks except the last, whereby the grain is continually fed through the machine and successively carried between the go rasping-plates, substantially as described.

3. The combination, with the hopper having an opening at its base, of the valve con sisting of two plates, each provided with a rack, a pinion meshing with the racks and 5 moving the plates in opposite directions, and a worm-wheel and screw for operating the pinion, substantially as described.

4.. The combination, with a supportingframe having a grooved nave, J, and a seri(s of stationary plates, of a shaft mounted in said frame, a series of running disks secured upon said shaft, and means for adjusting the relation of the plates and disks, consisting of the ring 1;, with lugs Z, fitting the grooves in the nave, the shell D, fitting said nave, an ad jacent stop-screw, P, supported in said shell, and clamp-nuts upon the shaft and stop-screw, substantially as and for the purpose described. In testimony that we claim the foregoing as our invention we have signed our names in presence of two subscribing witnesses.

JOHANN pinnen AEBI. JAKOB MUHLETHALER.

IIO

\Vitnesses:

EMIL HIRSBRUNNER, EMIL TRABEY. 

